555 ic and multivibrators

MOD_EDIT:
Hi,
why configure 555 ic in monostable,astable or bistable multivibrators.
please,this part of my project topic hence the answer should be in detailed form.
thanks.

Looks like you havent read the rules for posting,

https://www.electro-tech-online.com/threads/remote-sensor.2059/

I dont understand your question. You're asking why ? What do you mean ?

555 ic

hello to all who answered,

here's my guess to his question "why configure 555 into astable, mono, and bi"

guess 1. why is the design of this ic configured to funtion as astable, mono and bi.

guess 2. can it be used to function other than the above mentioned?

am so thankful i have stop formal schooling so many years back, i am lazy to do indepth research, would just like to depend on what people will say. no offense meant to anyone.